cl-interpret: Change print to print without newline, add new println builtin

compiler/cl-interpret/src/builtin.rs

@@ -16,6 +16,14 @@ builtins! {
     const MISC;
     /// Unstable variadic print function
     pub fn print<_, args> () -> IResult<ConValue> {
+        let mut out = stdout().lock();
+        for arg in args {
+            write!(out, "{arg}").ok();
+        }
+        Ok(ConValue::Empty)
+    }
+    /// Unstable variadic println function
+    pub fn println<_, args> () -> IResult<ConValue> {
         let mut out = stdout().lock();
         for arg in args {
             write!(out, "{arg}").ok();